preview method

void preview(
  1. String path,
  2. MaterialFile file
)

Draws path as file — unsaved edits — until endPreview: what uses it, its variants and the layered materials it is a layer of follow.

Implementation

void preview(String path, MaterialFile file) {
  if (_previews[path] == file) return;
  _previews[path] = file;
  _changed(path);
}